presidential candidates tomorrow evening will be on domestic policies with a heavy emphasis on the economy. both sides are already spinning. >> while president obama's people are saying, hey, i have had no chance to prepare anything, mitt romney's people are saying, hey, president obama is the best debater ever and i have never been in a presidential debate. >> reporter: both sides are off the campaign trail today preparing for the debate. mitt romney was spotted tacking with his debate partner senator rob portman. this picture has been a hit on political blogs as part of a caption contest. as for the president, he is near las vegas today for his rehearsals with senator john kerry and was caught joking about them. >> basically they're keeping me indoors all the time. it's a drag. [ laughter ] >> they're making me do my homework. >> reporter: while both the president and romney appeared relaxed, there is a lot at stake for their first head-to- head battle. >> in any good debate, you want to have some things prepared in advance. you want to have memorable lines, surprise your opponent and kn